AirHint found the following cheapest return flights from Frankfurt (FRA) to Ljubljana (LJU) in May 2026 (see full year).

Return flights

25 May - 31 May	Air Serbia
07 May - 11 May	Air Serbia
01 May - 03 May	Air Serbia
15 May - 17 May	Air Serbia
15 May - 22 May	Air Serbia
23 May - 30 May	Air Serbia
25 May - 05 Jun	Air Serbia
25 May - 31 May	Lufthansa	direct
25 May - 05 Jun	Lufthansa	direct
28 May - 31 May	Air Serbia
15 May - 22 May	Lufthansa	direct
23 May - 30 May	Lufthansa	direct
31 May - 06 Jun	Lufthansa	direct

Also check the deals for one-way flights from Frankfurt to Ljubljana in May.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Frankfurt to Ljubljana in May from $192

Return flights